Zircon reveals crystal-melt segregation processes in the genesis of Cretaceous A-type granites and related cumulated rocks in southeastern China
文献类型：期刊论文
| 作者 | Chen, Jing-Yuan2,3; Yang, Jin-Hui1,3; Zhang, Ji-Heng1; Zhu, Yu-Sheng3; Yang, Zhi-Guo2 |
| 刊名 | CHEMICAL GEOLOGY
 |
| 出版日期 | 2023-03-05 |
| 卷号 | 619页码:16 |
| 关键词 | A-type granite Magma reservoir Zircon Crystal accumulation Melt extraction |
| ISSN号 | 0009-2541 |
| DOI | 10.1016/j.chemgeo.2023.121303 |
| 英文摘要 | A-type granites are a distinctive group of igneous rocks classified based on chemical and mineralogical criteria. Although numerous theories for the origin of A-type granite have previously been proposed, their genesis re-mains highly controversial. In the current study, we present bulk-rock geochemistry and zircon U-Pb isotopes, Hf isotopes, and trace elemental data for a suite of quartz monzonite, porphyritic granite, and miarolitic alkali feldspar granite from the coastal area of Fujian, southeastern China, to evaluate the genetic link between these rocks. Zircon U-Pb dating indicates that these rocks were crystallized at similar to 94-102 Ma. Our data strongly sug-gests that lithological differences in these rocks are the result of crystal-melt segregation in the shallow crust. The quartz monzonites are enriched in Sr and Ba, with high Zr/Hf and low silica content and a weak negative Eu anomaly, representing the cumulate residue from the crystal-melt segregation of a magma reservoir. A limited fraction of zircon from the quartz monzonite has evolved trace element signatures (high Hf, Nb, Y, U; low Eu/ Eu*), indicating that the quartz monzonite represents a mixture of accumulated crystals and high silicic melt trapped in cumulate mush. The miarolitic alkali feldspar granites and porphyritic granites are enriched in silica and Rb, and depleted in Sr and Eu. They also display low whole-rock Zr/Hf and Eu/Eu* ratios, and high Rb/Sr ratios, representing highly evolved silicic melts that were segregated from a magma reservoir. The majority of the zircon grains from the miarolitic alkali feldspar granites exhibit the most evolved trace element signatures (high Hf, Nb, Y, U; low Zr/Hf and Eu/Eu*) of the entire suite. This reveals that these zircons crystallized from the high silicic melts extracted from a magma reservoir. Magma recharge and the exsolution of volatiles from the interstitial melt have promoted the segregation and upward extraction of high silica magmas from a compacting magma reservoir in the upper crust. Our work demonstrates that the miarolitic alkali feldspar granites with A -type granite features from the coastal area of southeastern China were generated by the crystal-melt segregation process in a shallow crustal magma reservoir. |
| WOS关键词 | SPIRIT MOUNTAIN BATHOLITH ; TRACE-ELEMENT COMPOSITION ; U-PB GEOCHRONOLOGY ; PARTITION-COEFFICIENTS ; ELDORADO MOUNTAINS ; ZHEJIANG PROVINCE ; NATURAL ZIRCON ; MAGMA CHAMBER ; SOUTH CHINA ; ISOTOPIC COMPOSITIONS |
| 资助项目 | National Natural Science Foundation of China[42073033] ; Chinese Ministry of Science and Technology[2012CB416702] ; Fundamental Research Funds for the Central Universities[300102279102] ; Fundamental Research Funds for the Central Universities[Y95401DXX2] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000919836600001 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/106885]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Chen, Jing-Yuan |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Changan Univ, Sch Earth Sci & Resources, Xian 710054, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, POB 9825, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Jing-Yuan,Yang, Jin-Hui,Zhang, Ji-Heng,et al. Zircon reveals crystal-melt segregation processes in the genesis of Cretaceous A-type granites and related cumulated rocks in southeastern China[J]. CHEMICAL GEOLOGY,2023,619:16. |
| APA | Chen, Jing-Yuan,Yang, Jin-Hui,Zhang, Ji-Heng,Zhu, Yu-Sheng,&Yang, Zhi-Guo.(2023).Zircon reveals crystal-melt segregation processes in the genesis of Cretaceous A-type granites and related cumulated rocks in southeastern China.CHEMICAL GEOLOGY,619,16. |
| MLA | Chen, Jing-Yuan,et al."Zircon reveals crystal-melt segregation processes in the genesis of Cretaceous A-type granites and related cumulated rocks in southeastern China".CHEMICAL GEOLOGY 619(2023):16. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。